In this third edition, the basic objective of the first two editions has been retained in order to present a comprehensive and rigorous treatment of classical thermodynamics while retaining an engineering perspective, and, in doing so, laying the groundwork for subsequent studies in such fields as fluid mechanics, heat transfer, and statistical thermodynamics. It also prepares the student to use thermodynamics in the practice of engineering. Many examples have been included in the book to assist the student in gaining an understanding of thermodynamics, and the problems at the end of each chapter have been carefully sequenced to correlate with the subject matter and provide some progression in difficulty. This book covers the basic subject matter of classical thermodynamics, and provides adequate preparation for study of the application of thermodynamics to the various professional fields as well as for study of more advanced topics in thermodynamics, such as those related to materials, surface phenomena, plasmas, and cryogenics.